Coupling means for coaxial cables



p 1942. w. A. BRUNQ 2,296,766

COUPLING MEANS FOR COAXIAL CABLES Filed Aug. 13, 1940 Flq'. 1 5

W/u MM 4. BRUNO sembled with a second connector member,

Patented Sept. 22, 1942 Bruno, Astoria, Long Island, N. Y., ls-

signor. by mesne assignments, to Bruno Patents tion of New York Inc.,Long Island City, N. Y

Application August 1:, mt, Serial No. :sasai 2 Claims. (Cl. 174-22) Thisinvention relates in coupling means for single conductor shieldedcables, and more particularly to coupling means for co-axial cables.

It is a well known fact that cables ofthe above mentioned type aredifilcult to handle, and, at times, must be cut in short lengths inorder to pass through the regular paths. Therefore, an installationrequiring this type of cable could be greatly simplified, andfacilitated by the use of convenient and eflective coupling accessoriesby means of which co-axial cables can be easily connectedanddisconnected.

One object of my invention is to provide coupling means for co-axialcables, which can be easily and quickly connected and disconnected, andarecapable of providing electrical and gaseous continuity in the cablethereby rendering all electrical connections air-tight, whilemaintaining gas communication within the cables.

Another object of my invention is to provide friction and constrictiveelectrical contacts, and

to produce such contacts for the inner .and/or outer conductor of thecable.

A further. obiect'of my invention is to provide a coupling mean forshielded cables, which can be easily fastened on 'the cable, andsimultaneously forms electrical connection with the outer conductor.

It is also an object of my invention to provide a coupling means forelectrical cables, in which electrical connection is eflected byfriction and clamping contact of contact members simultaneously.

Other objects and advantages will become apparent from thespecification, taken in connection with the accompanying drawing.

Fig.- l is a sectional view of one embodiment of my inventionillustrating a first connector member fastened at the end of a co-axia1cable, as-

the latter being partly broken away;

Fig. 2 is a sectional view of the second connector member shown in Fig.1.

Referring to Fig. l, the co-axial cable I shown therein in section, may.be of the solid copper tubing type, the braided type or any other formtrode of the cable, 8, I are spacing insulating washers, I is a firstconnecter member, 5 is the 1 member.

corresponding annular recess I! of the second connecter element shown inFigs. 1 and 2. This annular recess is formed by. an inner cylindricalsurface of the second connecter member and the outer cylindrical surfaceof an insulating member positioned in said second connecter An air-tightjoint may be produced by means of a rubber gasket 8, once the nut i isscrewed over the corresponding connecter part.

In order to connect the first connecter member 4 shown in Fig.1 to anend of ace-axial cable, it is necessary to remove the cotton braidcover, if this is present, for about 7 from the end, for example, thusexposing the conductor braid or solid copper tubing which forms theouter conductor of the cable. The center conductor tube iscut so as toprotrude about V from the extremity of the cable. Connecter member 4 isnow made to slide over the end of the cable I to which the connecter isto be fastened, far enough to allow the exposed outer conductor toprotrude just beyond the smaller diameter hole in connecter member I.When this has been done, eyelet 8 is putin place, and insulating washerI is screwed into member 4, taking care to allow the center conductor topass through contact member I. ,By screwing the insulating washer i intoplace, an end of eyelet 8 will be caused to abut outer conductor ll.

As further precaution against gas leak, the cable may be introduced intoa metal tube II, if desired, and a tight connection between the end ofsaid metal tube and the barrel may be secured by using conventionalcoupling means 32, as shown.

The second connector member shown in Figs. 1 and 2 consists at ametallic barrel I: having suitable recesses to accommodate insulatingwashers l8 and I3, through which center contact piece I extends. Thiscontact piece has tubular recesses II and II, said recess 33 receivofshielded conductor cable. 2 is the center eleclocking nut, and 6 aninsulating washer of the first connecter member. A contact member I, towhich the center electrode 2 or the cable I is electrically connectedbysoldering, for example,

I extends through said. insulatingwasher I. Once in parts are assembled,as shown in Fig. 1. Barrel I2 is also provided with an annular recessII, which receives the slotted tubular extension ll oi the receptacletype connecter part, whereby proper electrical contact between the outerconductor and barrel I: is secured, even without tightening locking nut5.

Once the first connector member is coupled with the second connectormember and locked by nut 5 a solid contact will be established betweenthe contact piece I and center conductor piece, H, as well as betweenthe outer cable connector I U and barrel I! of the second connecterwashers may be provided with suitable holes to r allow aerial connectionbetween the various chambers of the connector assemblies.

It is to be understood that my invention is not limited to the'speciflcembodiments presented herein for illustration, and is susceptible ofmodifications within the scope of the invention as defined in theappended claims.

I claim:

1. Coupling means for electrically connecting a co-axial cable, saidcoupling means comprising a first connecter member adapted to befastened at the end of a co-axial cable, and a second connecter memberadapted to be assembled with said first connecter member, said connectermembers being provided with means for producing a central conductorprong electrical contact, and an annular frictional contact for theouter conductor of said co-axial cable, said annular frictional contactbeing provided by a slotted tubular extension of said first connectermember fitting into a registering recess formed by an inner cylindricalsurface of said second connecter member and the outer cylindricalsurfaceof an necter'member.

2. In a coupling means be fastened on the end of a c0axia1 cable,contact means arranged in said barrel, connected with the centerconductor of a co-axial cable and electrically insulated from saidbarrel byv an insulating washer,- and a metallic member for producingelectrical contact between the-outer conductor of said co-axial cableand said barrel; a second connecter element provided with a centrallyarranged insulating member, a part of which is adapted to be insertedinto said first connecter e1ement,'said second connecter element beingadapted to be tightly connected with said first connecter element bymeans of a threaded metallic locking nut; said barrel of the firstconnecter element being provided with a slotted tubular extensionfitting into a registering annular recess formed by an inner cylindricalsurface of said second connecter element and an outer cylindricalsurface of said centrally arranged insulating member. said secondconnecter element being provided with a center conductor piece ledthrough said centrally arranged insulating member 0! saidsecond-connecter element, said center conductor piece havinga recessregistering with and receiving said contact means of said firstconnecter element.

WILLIAM A. BRUNO.

for electrically connecting a. co-axial cable, a first connecterelejment comprising a metallic barrel adapted to

